Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
doanh cua » doanh luan
tong cong » trong cong, cong cong, dung cong
cong sang » cong san, cong lang, cong vang
sang than » cang thang, dang thanh, sang tao
than cau » toan cau, phan cau, than cap
ban cua » ban quan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu sach) OR (chiet tach)) - canh ((doanh cua) or (ban cua)) tong cong sang than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (chiet tach)) - canh ((doanh cua) OR (ban cua)) tong cong sang than cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sach) OR (chiet tach)) - canh ((doanh cua) or (ban cua)) tong cong sang than cau*".